CELT is a very low delay audio codec designed for high-quality

communications.  Its potential uses include video-conferencing and

network music performance.  This is a maintained branch of the 0.5.1

prerelease of CELT.  

THIS 0.5.1-X PRERELEASE IS NOT COMPATABLE WITH ANY PREVIOUS OR

SUBSEQUENT NUMBERED RELEASE.

0.5.0 aand before as well as 0.5.2 and later use a different API, a

different ABI and a different bitstream format.  Only other

prereleases on this 0.5.1 branch are code, binary or stream compatable

with this version.

To compile:

% ./configure

% make

To test the encoder:

% testcelt <rate> <channels> <frame size> <bytes per packet> input.sw output.sw

...where input.sw is a 16-bit (machine endian) audio file sampled at

44.1 kHz or 48 kHz. The output file is already decompressed.  the

<rate> parameter is the number of bytes per packet to use.

Alternatively, there are now Ogg-based tools in tools/. Use the --help

option for details. These are quite similar to the speexenc/speexdec

tools. Note that these tools should be used for

_testing_purposes_only_; the bitstream format used by CELT-0.5.1 has

already been altered in subsequent releases.  Files produced by

celtenc051 will not be supported by later releases of celt.  They will

work only with releasein this 0.5.1 branch, and will not be supported

in the larger Ogg frameworks.